SHARED DATA REFINING DEVICE AND SHARED DATA REFINING METHOD

摘要

Each of a transmitter (1) and a receiver (2) dividestemporarily-shared data into one or more purification blocksand one or more disposable blocks, and mixes each purificationblock so as to enlarge a Hamming distance between correspondingpurification blocks being held by the transmitter (1) and thereceiver (2) by using a Hamming distance amplification effect.The transmitter (1) Vernam-encrypts the mixed data with thedisposable data and transmits the mixed data to the receiver(2), and the receiver (2) decrypts the receivedVernam-encrypted data by using a disposable block owned thereby,and compares the Hamming distance between the purificationblock owned thereby with the mixed data with a predeterminedvalue so as to judge whether each purification block can beshared between the transmitter (1) and the receiver (2).